gtkrc.c

gtk是linux一款强大的夸平台的图形化开发工具

  if (rc_style->engine)
    {
      style->engine = rc_style->engine;
      gtk_theme_engine_ref (style->engine);
      rc_style->engine->rc_style_to_style (style, rc_style);
    }

  return style;
}

/* Reuses or frees rc_styles */
static GtkStyle *
gtk_rc_style_init (GSList *rc_styles)
{
  gint i;

  GtkStyle *style = NULL;

  if (!realized_style_ht)
    realized_style_ht = g_hash_table_new ((GHashFunc)gtk_rc_styles_hash,
					   (GCompareFunc)gtk_rc_styles_compare);

  style = g_hash_table_lookup (realized_style_ht, rc_styles);

  if (!style)
    {
      GtkRcStyle *proto_style;
      GSList *tmp_styles;
      
      proto_style = gtk_rc_style_new ();

      tmp_styles = rc_styles;
      while (tmp_styles)
	{
	  GtkRcStyle *rc_style = tmp_styles->data;
	  GtkRcStylePrivate *rc_style_private;

	  for (i=0; i<5; i++)
	    {
	      if (!proto_style->bg_pixmap_name[i] && rc_style->bg_pixmap_name[i])
		proto_style->bg_pixmap_name[i] = g_strdup (rc_style->bg_pixmap_name[i]);

	      if (!(proto_style->color_flags[i] & GTK_RC_FG) && 
		    rc_style->color_flags[i] & GTK_RC_FG)
		{
		  proto_style->fg[i] = rc_style->fg[i];
		  proto_style->color_flags[i] |= GTK_RC_FG;
		}
	      if (!(proto_style->color_flags[i] & GTK_RC_BG) && 
		    rc_style->color_flags[i] & GTK_RC_BG)
		{
		  proto_style->bg[i] = rc_style->bg[i];
		  proto_style->color_flags[i] |= GTK_RC_BG;
		}
	      if (!(proto_style->color_flags[i] & GTK_RC_TEXT) && 
		    rc_style->color_flags[i] & GTK_RC_TEXT)
		{
		  proto_style->text[i] = rc_style->text[i];
		  proto_style->color_flags[i] |= GTK_RC_TEXT;
		}
	      if (!(proto_style->color_flags[i] & GTK_RC_BASE) && 
		    rc_style->color_flags[i] & GTK_RC_BASE)
		{
		  proto_style->base[i] = rc_style->base[i];
		  proto_style->color_flags[i] |= GTK_RC_BASE;
		}
	    }

	  if (!proto_style->font_name && rc_style->font_name)
	    proto_style->font_name = g_strdup (rc_style->font_name);
	  if (!proto_style->fontset_name && rc_style->fontset_name)
	    proto_style->fontset_name = g_strdup (rc_style->fontset_name);

	  if (!proto_style->engine && rc_style->engine)
	    {
	      proto_style->engine = rc_style->engine;
	      gtk_theme_engine_ref (proto_style->engine);
	    }
	  
	  if (proto_style->engine &&
	      (proto_style->engine == rc_style->engine))
	    proto_style->engine->merge_rc_style (proto_style, rc_style);

	  /* Point from each rc_style to the list of styles */

	  rc_style_private = (GtkRcStylePrivate *)rc_style;
	  if (!g_slist_find (rc_style_private->rc_style_lists, rc_styles))
	    rc_style_private->rc_style_lists = g_slist_prepend (rc_style_private->rc_style_lists, rc_styles);

	  tmp_styles = tmp_styles->next;
	}

      for (i=0; i<5; i++)
	if (proto_style->bg_pixmap_name[i] &&
	    (strcmp (proto_style->bg_pixmap_name[i], "<none>") == 0))
	  {
	    g_free (proto_style->bg_pixmap_name[i]);
	    proto_style->bg_pixmap_name[i] = NULL;
	  }

      style = gtk_rc_style_to_style (proto_style);

      g_hash_table_insert (realized_style_ht, rc_styles, style);
    }
  else
    g_slist_free (rc_styles);

  return style;
}

/*********************
 * Parsing functions *
 *********************/

static guint
gtk_rc_parse_statement (GScanner *scanner)
{
  guint token;
  
  token = g_scanner_peek_next_token (scanner);

  switch (token)
    {
    case GTK_RC_TOKEN_INCLUDE:
      token = g_scanner_get_next_token (scanner);
      if (token != GTK_RC_TOKEN_INCLUDE)
	return GTK_RC_TOKEN_INCLUDE;

      token = g_scanner_get_next_token (scanner);
      if (token != G_TOKEN_STRING)
	return G_TOKEN_STRING;

      gtk_rc_parse_file (scanner->value.v_string, FALSE);
      return G_TOKEN_NONE;

    case GTK_RC_TOKEN_STYLE:
      return gtk_rc_parse_style (scanner);

    case GTK_RC_TOKEN_BINDING:
      return gtk_binding_parse_binding (scanner);

    case GTK_RC_TOKEN_PIXMAP_PATH:
      return gtk_rc_parse_pixmap_path (scanner);

    case GTK_RC_TOKEN_WIDGET:
      return gtk_rc_parse_path_pattern (scanner);

    case GTK_RC_TOKEN_WIDGET_CLASS:
      return gtk_rc_parse_path_pattern (scanner);

    case GTK_RC_TOKEN_CLASS:
      return gtk_rc_parse_path_pattern (scanner);

    case GTK_RC_TOKEN_MODULE_PATH:
      return gtk_rc_parse_module_path (scanner);
       
    default:
      g_scanner_get_next_token (scanner);
      return /* G_TOKEN_SYMBOL */ GTK_RC_TOKEN_STYLE;
    }
}

static guint
gtk_rc_parse_style (GScanner *scanner)
{
  GtkRcStyle *rc_style;
  GtkRcStyle *parent_style;
  guint token;
  gint insert;
  gint i;
  
  token = g_scanner_get_next_token (scanner);
  if (token != GTK_RC_TOKEN_STYLE)
    return GTK_RC_TOKEN_STYLE;
  
  token = g_scanner_get_next_token (scanner);
  if (token != G_TOKEN_STRING)
    return G_TOKEN_STRING;
  
  insert = FALSE;
  rc_style = gtk_rc_style_find (scanner->value.v_string);
  
  if (!rc_style)
    {
      insert = TRUE;
      rc_style = gtk_rc_style_new ();
      rc_style->name = g_strdup (scanner->value.v_string);
      
      for (i = 0; i < 5; i++)
	rc_style->bg_pixmap_name[i] = NULL;

      for (i = 0; i < 5; i++)
	rc_style->color_flags[i] = 0;

      rc_style->engine = NULL;
      rc_style->engine_data = NULL;
    }
  
  token = g_scanner_peek_next_token (scanner);
  if (token == G_TOKEN_EQUAL_SIGN)
    {
      token = g_scanner_get_next_token (scanner);
      
      token = g_scanner_get_next_token (scanner);
      if (token != G_TOKEN_STRING)
	{
	  if (insert)
	    g_free (rc_style);

	  return G_TOKEN_STRING;
	}
      
      parent_style = gtk_rc_style_find (scanner->value.v_string);
      if (parent_style)
	{
	  for (i = 0; i < 5; i++)
	    {
	      rc_style->color_flags[i] = parent_style->color_flags[i];
	      rc_style->fg[i] = parent_style->fg[i];
	      rc_style->bg[i] = parent_style->bg[i];
	      rc_style->text[i] = parent_style->text[i];
	      rc_style->base[i] = parent_style->base[i];
	    }
	  
	  if (parent_style->fontset_name)
	    {
	      if (rc_style->fontset_name)
		g_free (rc_style->fontset_name);
	      rc_style->fontset_name = g_strdup (parent_style->fontset_name);
	    }
	  else if (parent_style->font_name)
	    {
	      if (rc_style->font_name)
		g_free (rc_style->font_name);
	      rc_style->font_name = g_strdup (parent_style->font_name);
	    }
	  
	  for (i = 0; i < 5; i++)
	    {
	      if (rc_style->bg_pixmap_name[i])
		g_free (rc_style->bg_pixmap_name[i]);
	      rc_style->bg_pixmap_name[i] = g_strdup (parent_style->bg_pixmap_name[i]);
	    }
	}
    }
  
  token = g_scanner_get_next_token (scanner);
  if (token != G_TOKEN_LEFT_CURLY)
    {
      if (insert)
	g_free (rc_style);

      return G_TOKEN_LEFT_CURLY;
    }
  
  token = g_scanner_peek_next_token (scanner);
  while (token != G_TOKEN_RIGHT_CURLY)
    {
      switch (token)
	{
	case GTK_RC_TOKEN_BASE:
	  token = gtk_rc_parse_base (scanner, rc_style);
	  break;
	case GTK_RC_TOKEN_BG:
	  token = gtk_rc_parse_bg (scanner, rc_style);
	  break;
	case GTK_RC_TOKEN_FG:
	  token = gtk_rc_parse_fg (scanner, rc_style);
	  break;
	case GTK_RC_TOKEN_TEXT:
	  token = gtk_rc_parse_text (scanner, rc_style);
	  break;
	case GTK_RC_TOKEN_BG_PIXMAP:
	  token = gtk_rc_parse_bg_pixmap (scanner, rc_style);
	  break;
	case GTK_RC_TOKEN_FONT:
	  token = gtk_rc_parse_font (scanner, rc_style);
	  break;
	case GTK_RC_TOKEN_FONTSET:
	  token = gtk_rc_parse_fontset (scanner, rc_style);
	  break;
	case GTK_RC_TOKEN_ENGINE:
	  token = gtk_rc_parse_engine (scanner, rc_style);
	  break;
	default:
	  g_scanner_get_next_token (scanner);
	  token = G_TOKEN_RIGHT_CURLY;
	  break;
	}

      if (token != G_TOKEN_NONE)
	{
	  if (insert)
	    {
	      if (rc_style->fontset_name)
		g_free (rc_style->fontset_name);
	      if (rc_style->font_name)
		g_free (rc_style->font_name);
	      for (i = 0; i < 5; i++)
		if (rc_style->bg_pixmap_name[i])
		  g_free (rc_style->bg_pixmap_name[i]);
	      g_free (rc_style);
	    }
	  return token;
	}
      token = g_scanner_peek_next_token (scanner);
    }
  
  token = g_scanner_get_next_token (scanner);
  if (token != G_TOKEN_RIGHT_CURLY)
    {
      if (insert)
	{
	  if (rc_style->fontset_name)
	    g_free (rc_style->fontset_name);
	  if (rc_style->font_name)
	    g_free (rc_style->font_name);
	  
	  for (i = 0; i < 5; i++)
	    if (rc_style->bg_pixmap_name[i])
	      g_free (rc_style->bg_pixmap_name[i]);
	  
	  g_free (rc_style);
	}
      return G_TOKEN_RIGHT_CURLY;
    }
  
  if (insert)
    {
      if (!rc_style_ht)
	rc_style_ht = g_hash_table_new ((GHashFunc) gtk_rc_style_hash,
					(GCompareFunc) gtk_rc_style_compare);
      
      g_hash_table_insert (rc_style_ht, rc_style->name, rc_style);
    }
  
  return G_TOKEN_NONE;
}

static guint
gtk_rc_parse_base (GScanner   *scanner,
		   GtkRcStyle *style)
{
  GtkStateType state;
  guint token;
  
  token = g_scanner_get_next_token (scanner);
  if (token != GTK_RC_TOKEN_BASE)
    return GTK_RC_TOKEN_BASE;
  
  token = gtk_rc_parse_state (scanner, &state);
  if (token != G_TOKEN_NONE)
    return token;
  
  token = g_scanner_get_next_token (scanner);
  if (token != G_TOKEN_EQUAL_SIGN)
    return G_TOKEN_EQUAL_SIGN;

  style->color_flags[state] |= GTK_RC_BASE;
  return gtk_rc_parse_color (scanner, &style->base[state]);
}

static guint
gtk_rc_parse_bg (GScanner   *scanner,
		 GtkRcStyle *style)
{
  GtkStateType state;
  guint token;
  
  token = g_scanner_get_next_token (scanner);
  if (token != GTK_RC_TOKEN_BG)
    return GTK_RC_TOKEN_BG;
  
  token = gtk_rc_parse_state (scanner, &state);
  if (token != G_TOKEN_NONE)
    return token;
  
  token = g_scanner_get_next_token (scanner);
  if (token != G_TOKEN_EQUAL_SIGN)
    return G_TOKEN_EQUAL_SIGN;

  style->color_flags[state] |= GTK_RC_BG;
  return gtk_rc_parse_color (scanner, &style->bg[state]);
}

static guint
gtk_rc_parse_fg (GScanner   *scanner,
		 GtkRcStyle *style)
{
  GtkStateType state;
  guint token;
  
  token = g_scanner_get_next_token (scanner);
  if (token != GTK_RC_TOKEN_FG)
    return GTK_RC_TOKEN_FG;
  
  token = gtk_rc_parse_state (scanner, &state);
  if (token != G_TOKEN_NONE)
    return token;
  
  token = g_scanner_get_next_token (scanner);
  if (token != G_TOKEN_EQUAL_SIGN)
    return G_TOKEN_EQUAL_SIGN;
  
  style->color_flags[state] |= GTK_RC_FG;
  return gtk_rc_parse_color (scanner, &style->fg[state]);
}

static guint
gtk_rc_parse_text (GScanner   *scanner,
		   GtkRcStyle *style)
{
  GtkStateType state;
  guint token;
  
  token = g_scanner_get_next_token (scanner);
  if (token != GTK_RC_TOKEN_TEXT)
    return GTK_RC_TOKEN_TEXT;
  
  token = gtk_rc_parse_state (scanner, &state);
  if (token != G_TOKEN_NONE)
    return token;
  
  token = g_scanner_get_next_token (scanner);
  if (token != G_TOKEN_EQUAL_SIGN)
    return G_TOKEN_EQUAL_SIGN;
  
  style->color_flags[state] |= GTK_RC_TEXT;
  return gtk_rc_parse_color (scanner, &style->text[state]);
}

static guint
gtk_rc_parse_bg_pixmap (GScanner   *scanner,
			GtkRcStyle *rc_style)
{
  GtkStateType state;
  guint token;
  gchar *pixmap_file;
  
  token = g_scanner_get_next_token (scanner);
  if (token != GTK_RC_TOKEN_BG_PIXMAP)
    return GTK_RC_TOKEN_BG_PIXMAP;
  
  token = gtk_rc_parse_state (scanner, &state);
  if (token != G_TOKEN_NONE)
    return token;
  
  token = g_scanner_get_next_token (scanner);
  if (token != G_TOKEN_EQUAL_SIGN)
    return G_TOKEN_EQUAL_SIGN;
  
  token = g_scanner_get_next_token (scanner);
  if (token != G_TOKEN_STRING)
    return G_TOKEN_STRING;
  
  if ((strcmp (scanner->value.v_string, "<parent>") == 0) ||
      (strcmp (scanner->value.v_string, "<none>") == 0))
    pixmap_file = g_strdup (scanner->value.v_string);
  else
    pixmap_file = gtk_rc_find_pixmap_in_path (scanner, scanner->value.v_string);
  
  if (pixmap_file)
    {
      if (rc_style->bg_pixmap_name[state])
	g_free (rc_style->bg_pixmap_name[state]);
      rc_style->bg_pixmap_name[state] = pixmap_file;
    }
  
  return G_TOKEN_NONE;
}

static gchar*
gtk_rc_check_pixmap_dir (const gchar *dir, const gchar *pixmap_file)
{
  gchar *buf;
  gint fd;

  buf = g_strdup_printf ("%s%c%s", dir, '/', pixmap_file);
  
  fd = open (buf, O_RDONLY);
  if (fd >= 0)
    {
      close (fd);
      return buf;
    }
  
  g_free (buf);

  return NULL;
}

gchar*
gtk_rc_find_pixmap_in_path (GScanner *scanner,
			    const gchar *pixmap_file)
{
  gint i;
  gchar *filename;
  GSList *tmp_list;
  
  for (i = 0; (i < GTK_RC_MAX_PIXMAP_PATHS) && (pixmap_path[i] != NULL); i++)
    {
      filename = gtk_rc_check_pixmap_dir (pixmap_path[i], pixmap_file);
      if (filename)
	return filename;
    }

  tmp_list = rc_dir_stack;
  while (tmp_list)
    {
      filename = gtk_rc_check_pixmap_dir (tmp_list->data, pixmap_file);
      if (filename)
	return filename;
      
      tmp_list = tmp_list->next;
    }

  if (scanner)
    g_warning (_("Unable to locate image file in pixmap_path: \"%s\" line %d"),
	       pixmap_file, scanner->line);
  else
    g_warning (_("Unable to locate image file in pixmap_path: \"%s\""),
	       pixmap_file);
    
  return NULL;
}

gchar*
gtk_rc_find_module_in_path (const gchar *module_file)
{
  gint i;
  gint fd;
  gchar *buf;
  
  for (i = 0; (i < GTK_RC_MAX_MODULE_PATHS) && (module_path[i] != NULL); i++)
    {
      buf = g_strdup_printf ("%s%c%s", module_path[i], '/', module_file);
      
      fd = open (buf, O_RDONLY);
      if (fd >= 0)
	{
	  close (fd);
	  return buf;
	}
      
      g_free (buf);
    }
    
  return NULL;
}

static guint
gtk_rc_parse_font (GScanner   *scanner,
		   GtkRcStyle *rc_style)